NIOXIN System 1 Thickening Shampoo 10.1 fl oz — For Natural Hair with Light Thinning, Niacinamide & Biotin

Nioxin System 1 Scalp + Hair Thickening Cleanser is a detoxifying shampoo formulated to add visible body and fullness to natural, non-chemically treated hair that shows light thinning.

Nioxin System 1 combines targeted botanicals, humectants and bionutrient actives to remove build-up and environmental impurities while preserving essential scalp oils. The formula is designed to clear nutrient pathways at the follicle level so hair looks thicker, feels stronger and carries improved shine without harsh stripping. Use daily with the matching System 1 Conditioner and Scalp & Hair Treatment for best results.

How does this shampoo help hair look thicker quickly?

The System 1 cleanser works by gently removing residue, pollen, minerals and sebum that can coat the scalp and hair shaft, restoring lift and natural movement. Its concentrated active blend helps create an optimal scalp environment so each strand appears fuller from root to tip.

• Detoxifying actives remove product and environmental build-up.
• Bionutrient components support hair resilience to reduce breakage.
• Formulation preserves essential oils to maintain healthy shine.
• Clinically observed improvements in thickness and density within weeks.

What is the correct way to use Nioxin System 1 for best results?

Apply the cleanser to wet hair, then massage into the scalp and through strands for about one minute to activate the formula. Rinse thoroughly and follow with the System 1 Scalp Therapy Conditioner and Scalp & Hair Treatment to lock in benefits and maintain scalp balance.

• Use daily for consistent scalp cleansing and visible effects.
• Massage for at least 60 seconds to clear follicles effectively.
• Pair with System 1 conditioner and treatment for a complete routine.
• Safe for natural, untreated hair; avoid on chemically altered hair types.

Which scalp and hair concerns does this formula address?

System 1 targets light thinning in natural hair by improving scalp cleanliness and supporting follicle access to nutrients. It helps reduce breakage and adds volume while supplying antioxidants and botanicals that nourish the scalp surface.

• Removes minerals, pollutants and styling residue that weigh hair down.
• Helps reduce visible thinning by strengthening hair resilience.
• Improves hair fullness, body and manageability without harsh stripping.
• Designed for fine, non-chemically treated hair showing light thinning.

Is System 1 backed by professional use and testing?

Nioxin has over 25 years of salon experience focused on thinning hair and works with trichology experts to shape its protocols. System 1 products have been clinically and dermatologically tested and recognized by industry stylists for consistent performance.

• Professional brand with longstanding salon and trichology support.
• Award recognition from stylists for thinning hair care over many years.
• Formulated to support scalp health as an extension of skin care practices.
• Recommended to be used as a multi-step system for optimal outcomes.

Who this is for: Nioxin System 1 is intended for people with natural or untreated fine hair experiencing light thinning who want to reduce visible thinning, add noticeable body and improve scalp condition. If your hair is chemically processed or you have severe thinning, consult product guidelines or a hair professional to select the right Nioxin system for your needs.

Ingredients

Aqua, Sodium Laureth Sulfate, Sodium Lauryl Sulfate, Cocamidopropyl Betaine, Sodium Citrate, Sodium Xylenesulfonate, Sodium Chloride, Cocamide MEA, Sodium Benzoate, Citric Acid, Salicylic Acid, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Tetrasodium EDTA, Sodium Hydroxide, Methylparaben, Propylene Glycol, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin, Niacinamide, Panthenol, Tocopheryl Acetate, Citrus Paradisi Peel Extract, Humulus Lupulus Flower Extract, Urtica Dioica Leaf Extract, CI 42090, Faex Extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinium Myrtillus Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, Potassium Sorbate